CN110397759B

CN110397759B - Throttle device

Info

Publication number: CN110397759B
Application number: CN201810378227.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2018-04-25
Filing date: 2018-04-25
Publication date: 2020-10-27
Anticipated expiration: 2038-04-25
Also published as: CN110397759A

Abstract

The invention discloses a throttling device, which comprises a valve body assembly (10), a valve core assembly (20), a nut assembly (41) and a lead screw, wherein the lead screw is in threaded fit with the nut, and the nut assembly (41) is relatively fixedly arranged with the valve body assembly 10; the valve body assembly has three ports: the throttling device further comprises a valve port part provided with a valve port and a throttling part provided with a throttling hole, and the third port is communicated with the first port through the throttling hole. The throttling device is internally provided with a valve port and a throttling hole respectively, and the opening degree of the valve port is adjusted through the action of a valve core, so that the opening degree of the valve port is controlled, fluid passing through the valve port and fluid passing through the throttling hole are adjusted and distributed, and the distribution and the throttling of two flow paths can be realized through small change.

Description

Throttle device

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of refrigeration, or to the technical field of fluid control.

[ background of the invention ]

In refrigeration systems, such as automotive air conditioners, household air conditioners, and even freezing and refrigerating systems, throttling elements, such as expansion valves, thermostatic expansion valves, or electronic expansion valves, are used, and the throttling elements function as throttling expansion in the system, but some systems may be used for two or more locations requiring cooling. Some air conditioners may be used for two different occasions, such as two rooms, to be cooled or heated respectively, for example, the air conditioner for a vehicle may be controlled separately for a cab and a passenger compartment, while some new energy vehicles may control the cab and a battery simultaneously, and a plurality of throttling elements are generally used for controlling the requirements at present, such as two electronic expansion valves or two thermal expansion valves.

[ summary of the invention ]

Aiming at the systems needing to distribute and throttle two pipelines, the invention adopts a throttling device to throttle and distribute, therefore, the invention adopts the following technical scheme:

a throttling device comprises a valve body assembly, a valve core assembly and a nut assembly, wherein the valve body assembly comprises a valve body, the valve core assembly comprises a valve core, the nut assembly comprises a nut, the throttling device further comprises a lead screw, the lead screw is in threaded fit with the nut, and the nut assembly and the valve body assembly are relatively and fixedly arranged; the valve body assembly has at least two interfaces: the throttling device further comprises a throttling portion, the throttling portion is provided with a throttling hole, and the third interface is communicated with the first interface through the throttling hole.

The throttle device adjusts the opening degree of the valve port through the action of the valve core in a mode of respectively arranging the valve port and the throttle hole inside, so as to control the opening degree of the valve port, and thus, the fluid passing through the valve port and the fluid passing through the throttle hole are distributed, adjusted and throttled.

Drawings

FIG. 1 is a schematic cross-sectional view of a flow restriction device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a partial structure of the throttling device shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a second embodiment of a flow restriction device;

FIG. 4 is a schematic cross-sectional view of a third embodiment of a flow restriction device;

FIG. 5 is a schematic cross-sectional view of a fourth embodiment of a flow restriction device;

FIG. 6 is a schematic cross-sectional view of a flow restriction device according to a sixth embodiment;

the direction of the dashed arrow in the figure indicates the general direction of fluid flow when the restriction device is in operation.

In the figure: 10. a valve body assembly 101, a valve cavity;

102. valve port, 1020 valve port; 103. a throttle, 1030, an orifice; 105. filter screen

11. A valve body;

12a, 12b, 12c. a nipple; 121. a first interface, 122, a second interface, 123, a third interface;

13. a valve seat;

20. the valve core assembly comprises a valve core assembly, 21, a valve core, 22, a valve rod, 23, a bushing, 24, a steel ball, 25 and 26, a rotor assembly;

31. bellows, 32 gear set, 321, first gear, 322, second gear, 323, third gear;

41. nut assembly, 42 motor, 43 housing, 44 lead.

Detailed Description

The throttling device comprises a valve body assembly, a valve core assembly and a nut assembly, wherein the valve body assembly comprises a valve body, the valve core assembly comprises a valve core, the nut assembly comprises a nut, the throttling device further comprises a lead screw, and the nut assembly and the valve body assembly are relatively fixedly arranged; the valve body assembly has at least two interfaces: the throttle device comprises a first interface, a second interface and a third interface, wherein the third interface can be arranged on a valve body assembly or other components, the valve body assembly further comprises a valve port part, the valve port part is provided with a valve port matched with a valve core, and the valve core is matched with the valve port. The screw rod is in threaded fit with the nut, the nut is relatively fixed, so that the screw rod rotates to move up and down within a certain range when rotating under the driving of the screw rod, the valve core is driven to move up and down within a certain stroke, namely the valve core can move relative to the valve port so as to adjust the opening degree of the valve port, the first interface and the second interface can be communicated through the valve port, the throttling device further comprises a throttling part, the throttling part is provided with a throttling hole, and the third interface is communicated with the first interface through the throttling hole. The throttling part can be arranged on the valve body or the valve seat, and can also be arranged on other components.

Specifically, the valve body assembly may include a throttle portion, and the valve body assembly has a third interface, the throttle device has a valve cavity, the first interface is directly communicated with the valve cavity, and the valve cavity is communicated with the second interface through the valve port; the third interface is communicated with the valve cavity through the throttling hole or the third interface is communicated with the first interface through the throttling hole.

The valve body assembly can comprise a valve seat, the valve seat and the valve body are relatively fixedly arranged, for example, the valve seat and the valve body are fixed in a compression fit mode or are relatively fixed through other components, the valve seat can comprise a valve opening portion, the valve body comprises the throttling portion, and the third interface is communicated with the first interface through the throttling hole and the valve cavity.

In addition, both the valve port part and the throttling part can be arranged on the valve body, the third interface is also arranged on the valve body assembly, the axial direction of the throttling hole is not overlapped with the axial direction of the valve port, and the throttling hole and the valve port are not arranged in parallel.

The valve body assembly may include a valve seat fixedly disposed opposite to the valve body, the valve seat having a valve port portion, the valve body having a throttle portion, the third port communicating with the first port through the throttle hole and the valve cavity, an equivalent diameter (D) of the throttle hole being smaller than an equivalent diameter (D) of the valve port, and an axial direction of the throttle hole may be substantially perpendicular or substantially parallel to an axial direction of the valve port.

The valve body assembly can also be provided with a third interface, the valve body comprises a valve port part and a throttling part, and the axial direction of the throttling hole is not coincident with and parallel to the axial direction of the valve port; an equivalent bore diameter (D) of the orifice is smaller than an equivalent bore diameter (D) of the valve port (1020), and an axial direction of the orifice is substantially perpendicular to an axial direction of the valve port.

The throttling device can also comprise a filter screen; the throttle device is provided with the filter screen in a flow channel from the valve port to the third port and/or the throttle device is provided with the filter screen in a flow channel from the throttle bore to the third port.

The following describes embodiments of the present invention with reference to the drawings.

Fig. 1 to 2 show a first embodiment, fig. 1 is a schematic sectional view of a throttle device, and fig. 2 is a schematic partial structure of the throttle device. Throttling arrangement includes valve body subassembly 10, case subassembly 20, nut component 41, valve body subassembly 10 includes valve body 11, valve seat 13, valve body 11 and valve seat 13 relatively fixed set up if through the tight fit, case subassembly 20 includes case 21, bush 23, lead screw 25, rotor subassembly 26, case subassembly 20 can move at the certain limit when the rotor rotates, nut component 41 and valve body subassembly 10 relatively fixed in this embodiment, specifically can be fixed through threaded connection or fixed through welded connection or fixed through compressing tightly etc. as the picture, nut component 41 can be connected fixedly with the valve body also can be connected fixedly through being connected fixedly with the valve seat and can even realize the relatively fixed with the valve body subassembly through other parts such as nut. The connection in this specification may be a direct connection or an indirect connection through other components, and is not limited herein, and accordingly, the fixing device may be a direct fixing or an indirect fixing through other components.

The throttling device comprises a motor 42, the motor 42 comprises a stator assembly and a rotor assembly, the stator assembly of the motor 42 and a valve body assembly and/or a nut assembly are relatively fixedly arranged, such as clamping, crimping, welding and the like, and can be relatively fixed through fixing of a shell 43, when the stator assembly of the motor 42 is sequentially electrified, the rotor can rotate between an upper limit position and a lower limit position, correspondingly, the rotor assembly 26 of the valve core assembly 20 can rotate in a corresponding range under the action of electromagnetic force of the motor, under the action of a screw rod 25 of the valve core assembly 20 and a thread pair of the nut assembly 41, when the rotor assembly 26 rotates, the screw rod 25 is changed into up-and-down motion in a certain range, namely, the screw rod 25 can move up-and-down or axially in a certain range, so as to drive the valve core 21 to move up-and-down in the certain range, the valve core 21 and the valve port, the flow area of the valve port 1020 can be adjusted within a corresponding range when the valve element 21 moves up and down, for example, the valve port 1020 can be fully opened, or a certain proportion of the valve port can be opened, and even the valve port 1020 can be fully closed when the valve element 21 abuts against the valve port portion 102.

The valve seat 13 of the present embodiment further includes a sealing ring, and the valve body 11 and the valve seat 13 can be relatively sealed at the connection matching portion by the sealing ring. The valve body assembly 10 has a throttling portion 103 and a valve port portion 102, the throttling portion 103 is provided with a throttling hole 1030, the valve port portion 102 is provided with a valve port 1020, specifically, in the embodiment, the valve port portion 102 is provided on the valve seat 13, the throttling portion 103 is provided on the valve body 11, and in addition, both the throttling portion 103 and the valve port portion 102 can be provided on the valve body or both can be provided on the valve seat, which can be selected according to the structure and the processing manufacturability.

The valve body assembly 10 has a valve chamber 101, a second chamber 101', the valve body assembly 10 is provided with three available interfaces for communication: the first port 121 is directly communicated with the valve chamber 101, the third port 123 is communicated with the valve chamber 101 through an orifice 1030, the second port 122 is communicated with the second chamber 101 ', the second chamber 101' is communicated with the valve chamber 101 through a valve port 1020, that is, the second port 122 is communicated with the valve chamber 101 through the valve port 1020. Thus, when in use, the first port 121 can be used as an inlet and used as a port for connecting with a refrigerant before throttling in a system, the second port 122 and the third port 123 can be used as two outlets after throttling, wherein the flow rate regulation range of the fluid from the port communicated with the second port is relatively large, and if the flow rate regulation range can be regulated from 0 to the maximum range, the flow rate regulation device is suitable for communicating with a heat exchanger which possibly needs to be closed; the flow regulation range of the fluid from the port communicated with the third interface is smaller than that of the second interface, when a compressor of the system is started to work, the third interface is always provided with the fluid, the third interface can be suitable for being communicated with a heat exchanger which needs to be communicated with a refrigerant when the system is started, if two interfaces are respectively communicated with heat exchangers used by a cockpit and a passenger cabin behind, the third interface can be communicated with the heat exchanger used for exchanging heat for the cockpit, and the second interface can be communicated with the heat exchanger used for exchanging heat for the passenger cabin; and when the two interfaces are respectively communicated with the heat exchangers of the passenger cabin and the battery, the third interface can be communicated with the heat exchanger for heat exchange of the battery, and the second interface can be communicated with the heat exchanger for heat exchange of the passenger cabin. According to the arrangement, the system is relatively simple, one throttling device can be used for replacing throttling elements and a tee joint in two pipelines, the flow of the refrigerant flowing to two flow paths of two objects is throttled and regulated respectively, the control is relatively simple compared with the separate control of the two throttling elements in the two pipelines, the flow distribution is carried out by using one throttling device, the interference between the two throttling elements is avoided, the flow distribution curve is relatively stable, and the system is suitable for systems which have not particularly high control precision requirements and need heat management of the two objects.

When the throttling device is used specifically, the first interface 121 may be used to connect with an outlet of a condenser, the second interface 122 and the third interface 123 may be connected with two evaporators respectively, similarly, the connection in this specification includes direct or indirect connection, the throttling device may be used to throttle the refrigerant passing through the throttling device and distribute the refrigerant of the two interfaces serving as outlets, and the operating state of the throttling device may include the following operating states:

in the first operating state, the valve body 21 abuts against the valve port portion 102, and at this time, the valve port 1020 does not substantially flow, and the refrigerant entering from the first port 121 does not substantially pass through the valve port 1020 to the first evaporator (not shown in the figure), and the refrigerant entering from the first port 121 substantially passes through the orifice 1030 and passes through the third port 123 to the second evaporator (not shown in the figure);

in the second operating state, the valve element 21 is not in contact with the valve port 102, at this time, the valve port 1020 is in flow communication, the refrigerant flowing through the valve port 1020 is adjustable within a certain range, a part of the refrigerant entering from the first port 121 passes through the valve port 1020 to the first evaporator, the other part of the refrigerant passes through the orifice 1030 and passes through the third port 123 to the second evaporator, the refrigerant distributed to the two outlets is related to the opening degree of the valve port, namely, is relatively adjustable, generally, the equivalent diameter D of the orifice 1030 is smaller than the equivalent diameter D of the valve port 1020, and of course, the equivalent diameter of the orifice 1030 also takes the influence of the depth of the orifice into consideration.

The first interface of the throttling device is arranged closer to one side of the rotor than the second interface, or a cavity where a rotor assembly of the throttling device is positioned at a relatively high-pressure side, so that the valve port can be relatively and favorably closed; in addition, the throttling device can be arranged in other forms, as shown in fig. 3, the embodiment is different in that the first port and the second port are arranged at different positions, the first port is arranged at a side relatively far away from the rotor than the second port, and the first port is arranged at a relatively lower pressure side than the second port or a cavity in which a rotor assembly of the throttling device is arranged, so that the valve port is more favorably opened. Other parts of this embodiment are the same as or similar to the above embodiment, and are not described in detail here.

The structure of the throttling device can be other structural forms, as shown in fig. 4, and the embodiment is different from the first embodiment in the structures of the valve body assembly and the valve core assembly, and the transmission structure and the motor of the throttling device are also different from the first embodiment. Specifically, the throttling device also comprises a valve body assembly 10, a valve core assembly 20 and a nut assembly 41, wherein the valve body assembly 10 comprises a valve body 11 and three connecting pipes: the valve comprises a first connecting pipe 12a, a second connecting pipe 12b and a third connecting pipe 12c, wherein a valve body 11 and the three connecting pipes are fixed by welding, and a throttling device is respectively provided with three interfaces connected with the outside at the three connecting pipes: a first port 121, a second port 122, and a third port 123, in which the throttle portion 103 and the valve port portion 102 of the present embodiment are disposed in the valve body 11, the first port 121 is communicated with the valve chamber 101, the valve chamber 101 is communicated with the second port 122 through a valve port 1020, that is, the first port 121 and the second port 122 are communicated with the valve port 1020 through the valve chamber 101, and an opening degree of the valve port is adjustable through a valve spool; the third port 123 is communicated with the valve cavity through the orifice 1030, that is, the flow rate between the first port 121 and the second port 122 is adjusted by the opening degree of the valve port, and the flow rate between the first port 121 and the third port 123 is also changed along with the change of the opening degree of the valve port under the influence of the size and the depth of the orifice, that is, the throttling device can distribute and throttle the refrigerant between the second port and the third port.

Nut component 41 passes through screw thread fixed connection with valve body component 10, and nut component 41 and valve body component 10's junction site accessible sealed pad or sealing washer etc. cooperation realize relatively, and motor element and nut component 41 fixed connection can be connected through modes such as screw thread or joint and realize relatively fixed in addition, can also fix through modes such as welding in addition. The valve core assembly 20 includes a valve core 21, a valve rod 22, a bellows 31, a steel ball 24, and a motor 42 includes a housing 43, the transmission mechanism of the throttling device of this embodiment further includes a gear set 32, the gear set 32 may be multi-stage, for example, the gear set includes a first gear 321, a second gear 322, and a third gear 323, an output shaft of the motor can drive the gears of the gear set to move, so as to drive the lead screw 25 to rotate, and the lead screw can move within a certain range up and down through the matching of the lead screw and a thread pair of the nut, so as to drive the valve core to move relative to the valve port within a certain range through the steel ball, the bushing 23, and the bellows 31, thereby. While the motor 42 may be connected to the outside through a lead 44.

The valve core 21 can move up and down in a specific range through the action of the motor, the valve core 21 and the valve port 1020 are arranged in a matching mode to adjust the opening degree of the valve port, when the valve core 21 moves up and down, the flow area of the valve port 1020 can be adjusted in a corresponding range, for example, the valve port 1020 can be fully opened, or the opening degree of a certain proportion, and even when the valve core 21 is abutted to the valve port portion 102, the valve port 1020 can be fully closed. The flow distribution and the throttling of the two interfaces of the throttling device are realized by adjusting the opening of the valve port and the arrangement of the throttling hole.

The throttling device can also be as shown in fig. 5, the main difference of this embodiment is that the location of the throttle hole is different, the throttle hole 1030 is arranged on the valve body 11, one end of the throttle hole 1030 is basically directly communicated with the first port 121, and the other end of the throttle hole 1030 is directly communicated with the third port 123. The throttling device can be further improved as shown in fig. 6, a filter screen 105 is arranged in a channel in front of the second interface and/or a channel in front of the third interface, so that on one hand, a filtering effect can be achieved, and in addition, flowing noise generated by bubbles after fluid throttling can be relatively eliminated, and the purpose of reducing noise is achieved; i.e. a filter screen is arranged in the flow passage from the valve port to the second port and/or a filter screen is arranged in the flow passage from the throttle hole to the third port, in particular, the filter screen may be a metal filter screen, such as a filter screen layer formed by combining multiple layers of filter screen cloth, or a filter screen with a ball structure formed by combining metal wires, etc.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various modifications, combinations, or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A throttling device comprises a valve body assembly (10), a valve core assembly (20), a nut assembly (41), wherein the valve body assembly (10) comprises a valve body (11), the valve core assembly (20) comprises a valve core (21), the nut assembly (41) comprises a nut, the throttling device further comprises a lead screw, the lead screw is in threaded fit with the nut, and the nut assembly (41) and the valve body assembly 10 are relatively fixedly arranged; characterized in that the valve body assembly has at least two interfaces: the throttling device comprises a first interface (121), a second interface (122), a third interface (123), a valve body assembly and a throttling part, wherein the valve body assembly further comprises a valve port part (102), the valve port part (102) is provided with a valve port (1020), the valve core is matched with the valve port, the valve core can act relative to the valve port so as to adjust the opening degree of the valve port, the first interface (121) and the second interface (122) can be communicated through the valve port, the throttling device further comprises a throttling part, the throttling part is provided with a throttling hole, and the third interface and the first interface are communicated through the throttling hole.

2. The throttle device of claim 1, wherein the valve body assembly (10) comprises the throttle portion, the valve body assembly (10) has the third interface (123), the throttle device has a valve chamber, the valve spool is at least partially located in the valve chamber, the first interface is in direct communication with the valve chamber, and the valve chamber is in communication with the second interface through the valve port; the third interface is communicated with the valve cavity through the throttling hole or the third interface is communicated with the first interface through the throttling hole.

3. The throttle device of claim 1, wherein the valve body assembly (10) further comprises a valve seat (13), the throttle device having a valve cavity, the valve seat (13) being fixedly disposed relative to the valve body (11), the valve seat comprising the valve orifice portion, the valve body comprising the throttle portion, and the third port being in communication with the first port via the throttle orifice and the valve cavity.

4. The throttling device according to claim 2, wherein the valve body assembly (10) further comprises a valve seat (13), the valve seat (13) is fixedly arranged relative to the valve body (11), the valve seat comprises the valve opening portion, the valve body comprises the throttling portion, and the third port and the first port are communicated through the throttling hole and the valve cavity.

5. A throttling device according to claim 1 or 2, characterized in that said valve body assembly (10) further has said third interface (123), said valve body comprising said valve port portion and said throttling portion, the axial direction of said throttling hole being non-coincident and non-parallel to the axial direction of said valve port.

6. The throttle device of claim 1, wherein the valve body assembly (10) further comprises a valve seat (13), the throttle device has a valve cavity, the valve seat (13) is fixedly disposed relative to the valve body (11), the valve seat comprises the valve port portion, the valve body comprises the throttle portion, the third port and the first port are communicated with the valve cavity through the throttle hole, the valve cavity, the equivalent through diameter (D) of the throttle hole (1030) is smaller than the equivalent through diameter (D) of the valve port (1020), and the axial direction of the throttle hole is substantially perpendicular or substantially parallel to the axial direction of the valve port.

7. A flow restriction device according to claim 2, wherein the valve body assembly (10) further comprises a valve seat (13), the valve seat (13) is fixedly arranged relative to the valve body (11), the valve seat comprises the valve port portion, the valve body comprises the flow restriction portion, the third port and the first port communicate with each other through the valve cavity and the orifice, the equivalent diameter (D) of the orifice (1030) is smaller than the equivalent diameter (D) of the valve port (1020), and the axial direction of the orifice is substantially perpendicular or substantially parallel to the axial direction of the valve port.

8. A throttling device according to claim 1 or 2, characterized in that said valve body assembly (10) further has said third interface (123), said valve body comprising said valve port portion and said throttling portion, the axial direction of said throttling hole being non-coincident with and non-parallel to the axial direction of said valve port; an equivalent bore diameter (D) of the orifice (1030) is smaller than an equivalent bore diameter (D) of the valve port (1020), and an axial direction of the orifice is substantially perpendicular to an axial direction of the valve port.

9. A flow restriction device according to any of the preceding claims 1-4, 6, 7, characterized in that the flow restriction device further comprises a screen;

the throttle device is provided with the filter screen in a flow channel from the valve port to the second port and/or the throttle device is provided with the filter screen in a flow channel from the throttle bore to the third port.

10. The choke device of claim 5, further comprising a screen;

11. A flow restriction device according to claim 8, characterized in that the flow restriction device further comprises a screen;

12. The throttle device of claim 1, wherein the valve body assembly (10) further comprises a valve seat (13), the throttle device having a valve cavity, the valve seat (13) being fixedly disposed relative to the valve body (11), the valve seat comprising the valve orifice portion, the valve body comprising the throttle portion, the third port being in communication with the first port via the throttle orifice and the valve cavity; the equivalent bore diameter (D) of the throttle hole (1030) is smaller than the equivalent bore diameter (D) of the valve port (1020), the axial direction of the throttle hole is approximately perpendicular to the axial direction of the valve port, the second port is arranged on the same side of the valve body for arranging the third port, the valve core assembly (20) comprises a rotor, and the third port is arranged relatively close to the rotor than the second port.

13. The throttling device according to claim 2, wherein the valve body assembly (10) further comprises a valve seat (13), the valve seat (13) is fixedly arranged relative to the valve body (11), the valve seat comprises the valve opening portion, the valve body comprises the throttling portion, and the third port and the first port are communicated through the throttling hole and the valve cavity; the equivalent bore diameter (D) of the throttle hole (1030) is smaller than the equivalent bore diameter (D) of the valve port (1020), the axial direction of the throttle hole is approximately perpendicular to the axial direction of the valve port, the second port is arranged on the same side of the valve body for arranging the third port, the valve core assembly (20) comprises a rotor, and the third port is arranged relatively close to the rotor than the second port.